Skip to main content

Home  About Us  Services  Projects  Contact Us  Member Login   
RA Consultants LLC was founded in 1991 by Robert (Bob) Alperstein, P.E., D.GE. The practice has expanded ever since primarily in the New York City Metropolitan area.

Founder and Consultant:


Robert Alperstein, P.E., D.GE.

Bob Alperstein, P.E., D.GE. successfully founded RA Consultants during the recession of 1991.  He had worked for 27 years in several geotechnical consulting firms before founding the firm.  Mr. Alperstein had been a vice president or held ownership positions in those firms for about 15 years and developed a professional reputation for providing quality and timely geotechnical engineering services and personal integrity.  He has published over a dozen articles relating to practical aspects of geotechnical engineering. Mr. Alperstein completed a bachelors of civil engineering at Cooper Union and a masters of geotechnical engineering at MIT.



Jane Raba, P.E.

Walter J. Papp, Jr., PhD., P.E.


Nidal M. AbiSaab, P.E.


Joseph Caciola Jr, P.E.

Elysha Rothstein, P.E.



Jane Raba, P.E. directs the structural engineering department within RA Consultants and founded the Support-of-Excavation Division. Prior to joining RA, she held the engineering license for the Electric Distribution Engineering Structures Department of Consolidated Edison where Ms. Raba developed a long term structural asset management program for the maintenance and upkeep of existing underground structures. She has a masters and bachelors in civil engineering from The Johns Hopkins University. Ms. Raba has nearly two decades of experience in the field of structural forensics, historic preservation, and soil structure interaction and she has served on the Board of the ASCE Metropolitan Section Geotechnical Group.

Walter J. Papp, Jr, Ph.D., P.E. joined the firm in 2007 and became a partner in 2008.  He presents more than two decades of Geotechnical Engineering experience.  He provides practical solutions to field related foundation problems and has significant geotechnical laboratory testing experience.   He is a member of professional societies and has published several professional papers.  Mr. Papp completed a bachelors in civil engineering and a PhD in geotechnical engineering at Rutgers University.


Nidal M. AbiSaab, P.E. joined the firm in 2007. He presents a more than 15 years of Geotechnical Engineering experience.  His experience includes design of foundation and support of excavation design, numerical modeling, and instrumentation.  Mr. AbiSaab completed a bachelors in civil engineering at the Lebanese American University and a masters at The Johns Hopkins University.  He was Chair of the ASCE Metropolitan Section Geotechnical Group and is a member of the Earth Retaining Structure Committee.